# Battery Unavailable error in ESCs calibration **URL:** \ **Category:** Pixhawk\ **Created:** [May 2, 2022, 2:04pm UTC](https://discuss.px4.io/t/battery-unavailable-error-in-escs-calibration/27224 "2022-05-02T14:04:16Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ET.Rock](https://discuss.px4.io/letter_avatar_proxy/v4/letter/e/50afbb/32.png) [@ET.Rock](https://discuss.px4.io/u/ET.Rock)\ **Post date:** [May 2, 2022, 2:04pm UTC](https://discuss.px4.io/t/battery-unavailable-error-in-escs-calibration/27224/1 "2022-05-02T14:04:16Z")
I am trying to use QGC to calibrate my ESCs, I follow the steps as prompted and it always reports the error Battery Unavailable. My F450 drone does not have a power module, the Pixhawk is powered by the ESC. I would like to know what is causing this problem? How should I be able to calibrate my ESC. My procedures: 1 Disconnect the battery 2 Pixhawk connected to computer via data cable 3 Click the calibrate button 4 QGC reports “Battery Unavailable” error Firmware: PX4 Pro Stable Release v1.12.3 ![1](https://discuss.px4.io/uploads/default/original/2X/6/66917c3496617f60f46740f5b39519d6dc295446.png) ---
**Author:** ![J\_MAN](https://discuss.px4.io/letter_avatar_proxy/v4/letter/j/9dc877/32.png) [@J\_MAN](https://discuss.px4.io/u/J_MAN)\ **Post date:** [May 9, 2023, 7:50am UTC](https://discuss.px4.io/t/battery-unavailable-error-in-escs-calibration/27224/2 "2023-05-09T07:50:07Z")
Good day. Have you found the solution to your problem? I’m struggling with the same problem.